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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 19 — Sep. 14, 2009
  • pp: 16911–16919

130-W picosecond green laser based on a frequency-doubled hybrid cryogenic Yb:YAG amplifier

Kyung-Han Hong, Chien-Jen Lai, Aleem Siddiqui, and Franz X. Kärtner  »View Author Affiliations

Optics Express, Vol. 17, Issue 19, pp. 16911-16919 (2009)

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130-W average-power picosecond green laser pulses at 514.5 nm are generated from a frequency-doubled hybrid cryogenic Yb:YAG laser. A second-harmonic conversion efficiency of 54% is achieved with a 15-mm-long noncritically phase-matched lithium triborate (LBO) crystal from a 240-W 8-ps 78-MHz pulse train at 1029 nm. The high-average-power hybrid laser system consists of a picosecond fiber chirped-pulse amplification seed source and a cryogenically-cooled double-pass Yb:YAG amplifier. The M2 value of 2.7, measured at 77 W of second-harmonic power, demonstrates a good focusing quality. A thermal analysis shows that the longitudinal temperature gradient can be the main limiting factor in the second-harmonic efficiency. To our best knowledge, this is the highest-average-power green laser source generating picosecond pulses.

© 2009 OSA

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(320.7090) Ultrafast optics : Ultrafast lasers
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Lasers and Laser Optics

Original Manuscript: July 14, 2009
Revised Manuscript: August 19, 2009
Manuscript Accepted: August 24, 2009
Published: September 8, 2009

Kyung-Han Hong, Chien-Jen Lai, Aleem Siddiqui, and Franz X. Kärtner, "130-W picosecond green laser based on a frequency-doubled hybrid cryogenic Yb:YAG amplifier," Opt. Express 17, 16911-16919 (2009)

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